1,610 research outputs found

    Social Change and Primitive Law: Consequences of a Papuan Lega! Case*

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    and hid in the jungle. He assumed that the girl's father would soon realize the futility of pursuit and, after his anger had cooled, might be prepared to accept a payment for his daughter. A bride price, which would ultimately be necessary in any event in order to prevent a rift within the political confederacy, would make the marriage formally valid, and this would absolve Awiitigaaj. Affairs seemed at first to develop contrary to the plans of our social reformer. The girl's father, the headman of the village of Kojogeepa, ruled that both his daughter and her seducer must be punished by death. His decision was upheld by the headman of the political confederacy. The relatives of Awiitigaaj and of the girl combed the forest for days trying to catch the incestuous couple. After a while, however, the girl's father became tired of the futile search and asked Awiitigaaj's relatives for the bride price, thereby implicitly recognizing the incestuous marriage as rightful. For his financial demand he was able to enlist the support of his own sublineage as well as that of the head of the confederacy. The seducer's relatives, however, refused to pay the price and continued to insist on the capital punishment of the couple. This infuriated the girl's father and, together with his sublineage, he resorted to a stick battle against the seducer's stubborn relatives. Thus, according to customary law, the seducer's relatives were absolved from payment of the bride price by being forced to fight. This release from their obligations induced them to accept and recognize the incestuous union. Thus, out of expediency, a precedent was established which broke down the traditional incest taboo and which, in the course of time, brought about a farreaching change in the law of the confederacy as well as in its social structure. Following his own precedent, the headman later married two second paternal parallel cousins from his own village. As a headman, he set an example for the other young men of Botukebo. To clothe his actions with an air of legality, he promulgated a new law, proclaiming that it was permissible to marry girls of the same sib and village as long as they were not first paternal parallel cousins. When asked in public about his motives, he gave me the following explanation: To marry a keneka [girl of the same sib and generation] is good as long as she is a second paternal parallel cousin. In the old days the people did not think. of this possibility, but now it is permissible. Adii people [a Kapauku sib living south of the Kamu Valley] have started this change [incest violation] and so I thought we were the same as they and I introduced the new custom. I married my cousins only after I became tonowi [headman] so that other people either were afraid to object or they agreed with me. To marry keneka is not bad, indeed it is nice; in this way one becomes rich. Since it was obvious that this justification, given in the" presence of other people, was a political speech rather than an honest answer, I questioned the headman once again when we were alone, and received the following confidential statement: "Why did I marry my relative? Well, I will tell you, but don't tell the others. I liked her; she was beautiful." To my inquiry about his new incest" regulation, he replied with a sly smile and a friendly punch under the ribs: (IPlease don't tell the others. They wouldn't like me and I would lose T HIS paper presents one of those exceptional volitional inventions by means of which a member of an unpacified primitive Papuan society radically changed the social structure of his village and political confederacy. The history of the legal case and the consequent changes were recorded during research among the Kapauku, Papuans of Netherlands New Guinea in 1954. The Kapauku live by means of horticulture in the Central Highlands in the. area of the large Wissel Lakes. Patrilineal descent, patrilocal residence, and, ideally speaking, the patriarchal polygynous family are the principal characteristics of their social structure. Approximately 15 households form a village inhabited by individuals belonging to the same patrilineage. A confederacy, composed of two or three intermarrying sibs and comprising a total of four to seven villages, unites about 600 people in a strong political group. Beyond this unit, war and diplomatic negotiations prevail; within the group, law and order are administered by wealthy headmen. Every village has its headman, and the most influential of these is elevated to confederacy leadership. The protagonist of our story is Awiitigaaj, the headman of the village of Botukebo, a prosperous pig breeder, a courageous war leader, and an enthusiast about feminine beauty. Like any connoisseur, he collected some extremely valuable specimens by marrying ten of the most attractive women in the Kamu Valley. ·Unfortunately, he discovered that the incest taboo-which prohibits marrying an individual of the same sib-would deprive his collection of at least one outstanding example of female pulchritude. Nevertheless, in 1935, he did not hesitate to break the taboo. Although he was the first man in the Kamu Valley to contract such an incestuous marriage, he knew that in the nearby Pona region some Adii men had contracted similar marriages and had succeeded in escaping social sanctions. The bride in question lived in the neighboring village of Kojogeepa and belonged to the same sib, but to another sublineage. To avoid the traditional penalty of execution, he eloped with the gir

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W+μ+νW^+ \rightarrow \mu^+\nu and WμνW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

    Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

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    Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

    Search for direct stau production in events with two hadronic tau-leptons in root s=13 TeV pp collisions with the ATLAS detector

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    A search for the direct production of the supersymmetric partners ofτ-leptons (staus) in final stateswith two hadronically decayingτ-leptons is presented. The analysis uses a dataset of pp collisions corresponding to an integrated luminosity of139fb−1, recorded with the ATLAS detector at the LargeHadron Collider at a center-of-mass energy of 13 TeV. No significant deviation from the expected StandardModel background is observed. Limits are derived in scenarios of direct production of stau pairs with eachstau decaying into the stable lightest neutralino and oneτ-lepton in simplified models where the two staumass eigenstates are degenerate. Stau masses from 120 GeV to 390 GeV are excluded at 95% confidencelevel for a massless lightest neutralino

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

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    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

    Measurement of VH, H → b b ¯ production as a function of the vector-boson transverse momentum in 13 TeV pp collisions with the ATLAS detector

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    Cross-sections of associated production of a Higgs boson decaying into bottom-quark pairs and an electroweak gauge boson, W or Z, decaying into leptons are measured as a function of the gauge boson transverse momentum. The measurements are performed in kinematic fiducial volumes defined in the `simplified template cross-section' framework. The results are obtained using 79.8 fb-1 of proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. All measurements are found to be in agreement with the Standard Model predictions, and limits are set on the parameters of an effective Lagrangian sensitive to modifications of the Higgs boson couplings to the electroweak gauge bosons

    Muon reconstruction and identification efficiency in ATLAS using the full Run 2 pp collision data set at \sqrt{s}=13 TeV

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    This article documents the muon reconstruction and identification efficiency obtained by the ATLAS experiment for 139 \hbox {fb}^{-1} of pp collision data at \sqrt{s}=13 TeV collected between 2015 and 2018 during Run 2 of the LHC. The increased instantaneous luminosity delivered by the LHC over this period required a reoptimisation of the criteria for the identification of prompt muons. Improved and newly developed algorithms were deployed to preserve high muon identification efficiency with a low misidentification rate and good momentum resolution. The availability of large samples of Z\rightarrow \mu \mu and J/\psi \rightarrow \mu \mu decays, and the minimisation of systematic uncertainties, allows the efficiencies of criteria for muon identification, primary vertex association, and isolation to be measured with an accuracy at the per-mille level in the bulk of the phase space, and up to the percent level in complex kinematic configurations. Excellent performance is achieved over a range of transverse momenta from 3 GeV to several hundred GeV, and across the full muon detector acceptance of |\eta |<2.7

    Searches for lepton-flavour-violating decays of the Higgs boson in s=13\sqrt{s}=13 TeV pp\mathit{pp} collisions with the ATLAS detector

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    This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H → eτ and H → μτ , performed with the ATLAS detector at the LHC. The searches are based on a data sample of proton–proton collisions at a centre-of-mass energy √s = 13 TeV, corresponding to an integrated luminosity of 36.1 fb−1. No significant excess is observed above the expected background from Standard Model processes. The observed (median expected) 95% confidence-level upper limits on the leptonflavour-violating branching ratios are 0.47% (0.34+0.13−0.10%) and 0.28% (0.37+0.14−0.10%) for H → eτ and H → μτ , respectively.publishedVersio

    Search for heavy neutral Higgs bosons produced in association with b-quarks and decaying into b-quarks at root s=13 TeV with the ATLAS detector

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    A search for heavy neutral Higgs bosons produced in association with one or two b -quarks and decaying to b -quark pairs is presented using 27.8  fb − 1 of √ s = 13  TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015 and 2016. No evidence of a signal is found. Upper limits on the heavy neutral Higgs boson production cross section times its branching ratio to b ¯ b are set, ranging from 4.0 to 0.6 pb at 95% confidence level over a Higgs boson mass range of 450 to 1400 GeV. Results are interpreted within the two-Higgs-doublet model and the minimal supersymmetric Standard Model

    Erratum: Measurement of angular and momentum distributions of charged particles within and around jets in Pb + Pb and pp collisions at √sNN = 5.02 TeV with the ATLAS detector [Phys. Rev. C 100 , 064901 (2019)]

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